DE3604642A1 - Magnetooptisches aufzeichnungsmedium - Google Patents
Magnetooptisches aufzeichnungsmediumInfo
- Publication number
- DE3604642A1 DE3604642A1 DE19863604642 DE3604642A DE3604642A1 DE 3604642 A1 DE3604642 A1 DE 3604642A1 DE 19863604642 DE19863604642 DE 19863604642 DE 3604642 A DE3604642 A DE 3604642A DE 3604642 A1 DE3604642 A1 DE 3604642A1
- Authority
- DE
- Germany
- Prior art keywords
- magneto
- recording medium
- optical recording
- medium according
- amorphous layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 19
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 18
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 16
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 14
- 229910052691 Erbium Inorganic materials 0.000 claims abstract description 11
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 94
- 229910045601 alloy Inorganic materials 0.000 claims description 43
- 239000000956 alloy Substances 0.000 claims description 43
- 229910017061 Fe Co Inorganic materials 0.000 claims description 24
- 239000011241 protective layer Substances 0.000 claims description 8
- -1 rare earth transition metal Chemical class 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims 6
- 230000007797 corrosion Effects 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 19
- 150000002910 rare earth metals Chemical class 0.000 abstract description 7
- 229910000640 Fe alloy Inorganic materials 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 6
- 229910052703 rhodium Inorganic materials 0.000 abstract description 6
- 108010053481 Antifreeze Proteins Proteins 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 229910052715 tantalum Inorganic materials 0.000 abstract description 4
- 150000003624 transition metals Chemical class 0.000 abstract 2
- 239000000654 additive Substances 0.000 abstract 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 9
- 238000002425 crystallisation Methods 0.000 description 9
- 230000008025 crystallization Effects 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910002059 quaternary alloy Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229910003321 CoFe Inorganic materials 0.000 description 1
- 101000993059 Homo sapiens Hereditary hemochromatosis protein Proteins 0.000 description 1
- 230000005374 Kerr effect Effects 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000010549 co-Evaporation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
- G11B11/10589—Details
- G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
- G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Thin Magnetic Films (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60054422A JPS61214254A (ja) | 1985-03-20 | 1985-03-20 | 光磁気記録材料 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3604642A1 true DE3604642A1 (de) | 1986-10-02 |
| DE3604642C2 DE3604642C2 (enrdf_load_stackoverflow) | 1993-02-11 |
Family
ID=12970271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19863604642 Granted DE3604642A1 (de) | 1985-03-20 | 1986-02-14 | Magnetooptisches aufzeichnungsmedium |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS61214254A (enrdf_load_stackoverflow) |
| KR (1) | KR940008408B1 (enrdf_load_stackoverflow) |
| DE (1) | DE3604642A1 (enrdf_load_stackoverflow) |
| NL (1) | NL191807C (enrdf_load_stackoverflow) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3623285A1 (de) * | 1985-07-12 | 1987-01-22 | Hitachi Ltd | Magnetooptisches aufzeichnungsmedium |
| DE3912378A1 (de) * | 1988-04-14 | 1989-10-26 | Ricoh Kk | Magneto-optisches aufzeichnungsmaterial |
| EP0275189A3 (en) * | 1987-01-14 | 1990-01-10 | Minnesota Mining And Manufacturing Company | Stable magneto optic recording medium |
| US5353268A (en) * | 1990-08-10 | 1994-10-04 | Minnesota Mining And Manufacturing Company | Thermomagnetic recording system employing a medium having high storage density and direct-overwrite capability as a result of along-track isocoercivity |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2601796B2 (ja) * | 1985-12-05 | 1997-04-16 | 日立マクセル株式会社 | 光磁気記録媒体 |
| JPS6297153A (ja) * | 1985-10-23 | 1987-05-06 | Sumitomo Metal Mining Co Ltd | 磁性薄膜記録媒体 |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3002642A1 (de) * | 1979-02-06 | 1980-08-14 | Philips Nv | Thermomagnetischer datentraeger und optischer speicher mit einem derartigen datentraeger |
| GB2071696A (en) * | 1980-03-12 | 1981-09-23 | Kokusai Denshin Denwa Co Ltd | Magneto-optical Recording Medium |
| JPS5873746A (ja) * | 1981-10-27 | 1983-05-04 | Kokusai Denshin Denwa Co Ltd <Kdd> | 光磁気記録媒体 |
| DE3309485A1 (de) * | 1982-03-18 | 1983-09-29 | Otter Controls Ltd., Buxton, Derbyshire | Schutzeinheit fuer tauchelemente |
| DE3317101A1 (de) * | 1982-05-10 | 1983-11-10 | Canon K.K., Tokyo | Magnetooptischer aufzeichnungstraeger |
| JPS5984358A (ja) * | 1982-11-04 | 1984-05-16 | Seiko Instr & Electronics Ltd | 光磁気記録媒体 |
| EP0111988A1 (en) * | 1982-12-15 | 1984-06-27 | Sharp Kabushiki Kaisha | Magneto-optic memory device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59178641A (ja) * | 1983-03-29 | 1984-10-09 | Kokusai Denshin Denwa Co Ltd <Kdd> | 光磁気記録媒体 |
| JPS6115308A (ja) * | 1984-07-02 | 1986-01-23 | Hitachi Ltd | 光磁気記録材料 |
| JPS6119644A (ja) * | 1984-07-06 | 1986-01-28 | Idemitsu Petrochem Co Ltd | 線状低密度ポリエチレン樹脂組成物 |
| JPS6134744A (ja) * | 1984-07-25 | 1986-02-19 | Hitachi Ltd | 磁気光学記録媒体 |
| JPS6184803A (ja) * | 1984-10-03 | 1986-04-30 | Oki Electric Ind Co Ltd | 光磁気記録用材料 |
-
1985
- 1985-03-20 JP JP60054422A patent/JPS61214254A/ja active Pending
-
1986
- 1986-02-14 DE DE19863604642 patent/DE3604642A1/de active Granted
- 1986-02-14 NL NL8600379A patent/NL191807C/xx not_active IP Right Cessation
- 1986-03-07 KR KR1019860001614A patent/KR940008408B1/ko not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3002642A1 (de) * | 1979-02-06 | 1980-08-14 | Philips Nv | Thermomagnetischer datentraeger und optischer speicher mit einem derartigen datentraeger |
| GB2071696A (en) * | 1980-03-12 | 1981-09-23 | Kokusai Denshin Denwa Co Ltd | Magneto-optical Recording Medium |
| JPS5873746A (ja) * | 1981-10-27 | 1983-05-04 | Kokusai Denshin Denwa Co Ltd <Kdd> | 光磁気記録媒体 |
| DE3309485A1 (de) * | 1982-03-18 | 1983-09-29 | Otter Controls Ltd., Buxton, Derbyshire | Schutzeinheit fuer tauchelemente |
| DE3317101A1 (de) * | 1982-05-10 | 1983-11-10 | Canon K.K., Tokyo | Magnetooptischer aufzeichnungstraeger |
| JPS5984358A (ja) * | 1982-11-04 | 1984-05-16 | Seiko Instr & Electronics Ltd | 光磁気記録媒体 |
| EP0111988A1 (en) * | 1982-12-15 | 1984-06-27 | Sharp Kabushiki Kaisha | Magneto-optic memory device |
Non-Patent Citations (2)
| Title |
|---|
| MRS Spring Meeting Symposium D 6.5 (1985) * |
| US-Z.: "J. Appl. Phys.", Bd. 57, Nr. 8(1985), S. 3903 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3623285A1 (de) * | 1985-07-12 | 1987-01-22 | Hitachi Ltd | Magnetooptisches aufzeichnungsmedium |
| EP0275189A3 (en) * | 1987-01-14 | 1990-01-10 | Minnesota Mining And Manufacturing Company | Stable magneto optic recording medium |
| DE3912378A1 (de) * | 1988-04-14 | 1989-10-26 | Ricoh Kk | Magneto-optisches aufzeichnungsmaterial |
| US5353268A (en) * | 1990-08-10 | 1994-10-04 | Minnesota Mining And Manufacturing Company | Thermomagnetic recording system employing a medium having high storage density and direct-overwrite capability as a result of along-track isocoercivity |
Also Published As
| Publication number | Publication date |
|---|---|
| NL8600379A (nl) | 1986-10-16 |
| JPS61214254A (ja) | 1986-09-24 |
| KR940008408B1 (ko) | 1994-09-14 |
| NL191807B (nl) | 1996-04-01 |
| KR860007645A (ko) | 1986-10-15 |
| DE3604642C2 (enrdf_load_stackoverflow) | 1993-02-11 |
| NL191807C (nl) | 1996-08-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8363 | Opposition against the patent | ||
| 8328 | Change in the person/name/address of the agent |
Free format text: STREHL, P., DIPL.-ING. DIPL.-WIRTSCH.-ING. SCHUEBEL-HOPF, U., DIPL.-CHEM. DR.RER.NAT. GROENING, H.,DIPL.-ING., PAT.-ANWAELTE, 8000 MUENCHEN |
|
| 8366 | Restricted maintained after opposition proceedings | ||
| 8305 | Restricted maintenance of patent after opposition | ||
| D4 | Patent maintained restricted | ||
| 8339 | Ceased/non-payment of the annual fee |